Home/ Montana/ Rock Island Lake, Lower
Stocked last season

Rock Island Lake, Lower Fish Stocking

Montana · 1938 to 1990 on record

According to FWP records, Rock Island Lake, Lower has 4 stocking records on file across 2 species. The most recent stocking season represented is 1990.

Rock Island Lake, Lower stocking
Rock Island Lake, Lower photo
replace with photo
4
Stocking records
53,640
Fish reported stocked
2
Species
1990
Latest season

Stocking activity by season

4 seasons on record, most in the 1990 (1 records). Click a bar to jump to that season below.

1 records
1990 · 400 fish
1938
1941
1960
1990

Stocking records per season (labelled by the season's end year). Montana's source reports by season, so records aren't broken out by month.

Most-stocked species

Rainbow Trout 3 records
Yellowstone Cutthroat Trout 1 record

Location

45.2976, -113.6810

Get directions OpenStreetMap →

Stocking history

Values shown exactly as the agency reported them; species names are normalized for search.

SpeciesFish stockedSizePhase
Yellowstone Cutthroat Trout 400 1.7 in McBride Lake - Big Timber

A stocking record does not guarantee fish remain present or may legally be harvested. Check current Montana fishing regulations →

Quick facts

Latest season 1990
Most stocked Rainbow Trout
Species Rainbow Trout, Yellowstone Cutthroat Trout
Seasons on record 1938 – 1990
Fish reported 53,640
Coordinates 45.2976, -113.6810

Data source

Compiled from public records published by the Montana Fish, Wildlife & Parks. StockedSpots is independent and not affiliated with or endorsed by FWP.

Source: Montana Fish, Wildlife & Parks (FWP). Data last checked September 1, 2026.
View FWP source →

Nearby stocked waters

Frequently asked questions

FWP records show Rock Island Lake, Lower stocked with Rainbow Trout, Yellowstone Cutthroat Trout.

See something that looks off?

Every stocking record on StockedSpots is pulled directly from official state wildlife agency sources — you can see exactly where each state's data comes from on our data sources page. If a record looks wrong, or you'd like a page reviewed or removed, let us know and we'll look into it.

Report an issue →